24 results about "Free radical oxidation" patented technology

The invention provides a surface modification method for a lithium-rich manganese-based positive electrode material, which comprises the following steps of: washing by using a peroxide-containing aqueous solution, properly increasing the washing temperature (preferably 40-80 DEG C), regulating the reaction pH value to 1-7, accurately controlling the ratio of acidity to free radical oxidation reaction, and optimizing the interface stability, oxygen vacancy density and Li < + > diffusion rate, thereby obtaining the lithium-rich manganese-based positive electrode material. Meanwhile, the dosage of peroxide (preferably persulfate) is reduced, the reaction time is shortened, the modification efficiency is improved, the raw material consumption is reduced, and the production cost is reduced.

The invention discloses application of compound resina draconis in preparation of a medicine for treating acute myocardial infarction. The compound resina draconis has the effects of resisting free radical oxidation and platelet aggregation, expanding coronary artery, inhibiting increase of myocardial enzymology CPK and LDH and reducing myocardial oxygen consumption, so that the myocardial infarction range is reduced, and myocardial ischemic ST segment elevation is improved; the compound is combined with aspirin for treating acute myocardial infarction, and the compound and aspirin have a synergistic effect, play a role in resisting platelet aggregation and inhibit synthesis of thromboxane A2, and show a good ischemic myocardial protection effect. Meanwhile, according to the technical scheme that the compound resina draconis is used independently or combined with aspirin, the application range of the medicine is widened, contribution is made for research and development of the medicine for relieving side effects caused by aspirin treatment, and the application prospect is good.

The application belongs to the field of heavy metal water pollution treatment, and relates to a method for rapidly and efficiently oxidizing trivalent arsenic through enhanced electron transfer, which comprises multifunctional biochar preparation and efficient oxidation process design. The method uses sludge as a biochar precursor, obtains multifunctional biochar with strong alkalinity, high specific surface area and super electron conduction through high-temperature pyrolysis, directly introduces oxygen into an As(III) solution, adds the biochar into the system after the aeration is completed, and fully stirs. The method is simple, economically feasible, has extremely high oxidation efficiency, does not require additional chemical reagents, has no reagent residues, and does not require external light or electricity. The non-free radical oxidation path dominated by electron transfer and singlet oxygen is not easily affected by inorganic ions and humic acid in actual water bodies, has strong anti-interference ability, and has a wide application range. The application not only helps to enrich the catalytic oxidation theoretical system, but also greatly improves the practical feasibility of biochar application, and has good environmental and economic benefits.

The invention belongs to the technical field of pollutant treatment, and particularly relates to a Cu < 2 + >-mediated method for degrading neonicotinoid pollutants in a water body, which comprises the following steps: S1, adjusting the initial pH value of the water body containing the neonicotinoid pollutants to 6.0-9.0; s2, adding bivalent copper ions Cu < 2 + > and hypochlorous acid HOCl into the water body, and reacting for 12-48 hours; the concentration of bivalent copper ions Cu < 2 + > is not higher than 1mg / L, and the concentration of hypochlorous acid HOCl is not higher than 10mg Cl2 / L. Compared with the prior art, the induction mechanism of Cu < 2 + > on free radical oxidation of the neonicotinoid pollutants is clarified, the degradation speed and the total degradation rate of the neonicotinoid pollutants are improved by utilizing Cu < 2 + >, the degradation rate of the neonicotinoid pollutants after 6 hours exceeds 60%, and the degradation rate of the neonicotinoid pollutants after 36 hours can reach 99%.

The present application relates to the technical field of water treatment, in particular to a preparation method of a confined carbon film electrode and application thereof. The advanced oxidation technology is a free radical oxidation system mainly with hydroxyl radicals and sulfate radicals. When degrading persistent organic pollutants, the hydroxyl radicals and sulfate radicals are easily consumed by chain reaction with anions in water and also produce toxic byproducts. In view of the above problems, the present application provides a confined carbon film electrode which is formed by depositing Fe2O3 / CNTs composite material on the surface of a microporous filter membrane to form a membrane electrode. The Fe2O3 / CNTs composite material is to confine iron oxide nanoparticles on the sidewall of the hollow pipe of carboxyl functionalized CNTs. The present application combines electrocatalysis technology and membrane separation technology, can more efficiently remove harmful substances such as persistent organic pollutants and heavy metals in water, and has higher water purification efficiency compared with the single electrocatalysis technology and membrane separation technology.

The application provides an edible active coating for preventing dry consumption under an ultralow temperature condition and a preparation method, and belongs to the technical field of active packaging. The application combines double-layer coatings, inhibits free radical oxidation generated by freezing through an inner antioxidant, and effectively locks water and blocks external oxygen permeation through the synergistic effect of an outer high-barrier structure, thereby significantly improving the freezing preservation effect of food, and the raw materials are natural and safe, the preparation method is reasonable, and the application has good practical application value. The application solves the problems of poor effects of edible freezing protection coatings suitable for extremely cold environments in the prior art.

The invention discloses a method for preparing an arsenic passivator from coal gangue and iron tailings. The method comprises the following steps: mixing iron tailing powder, coal gangue powder and water to prepare slurry; introducing the mixed slurry into a closed reactor, carrying out free radical oxidation exothermic reaction on carbon-based minerals in the coal gangue in a high-temperature and high-pressure oxygen-controlled atmosphere to generate organic acid and organic matters, and forming a reducing atmosphere due to insufficient oxygen supply; under the high-temperature hydrothermal condition, decomposition and reconstruction of the iron tailings and the coal gangue powder are promoted, so that carbon organic matter is converted, iron is activated, and a passivation material is synthesized; and after the reaction is finished, carrying out solid-liquid separation on the reaction product, and washing to obtain the product arsenic passivator. According to the method, organic matter of carbon in the coal gangue is converted and high activity of iron in the iron tailings is converted under the hydrothermal condition of high temperature, high pressure and oxygen control, and the obtained arsenic passivator can effectively achieve fixed passivation of soil arsenic and improvement of the organic matter.

The invention discloses a non-free radical catalytic oxidation water treatment method for regulating and controlling a sulfamethoxazole degradation path by using nitrite, and relates to the technical field of water treatment, and the non-free radical catalytic oxidation water treatment method comprises the following steps: adding a carbonized polydopamine coated cobalt nanoparticle material and peroxymonosulfate into a to-be-treated water body containing nitrite and sulfamethoxazole; the method comprises the following steps: firstly, carrying out adsorption of an oxidant on the surface of a catalyst, and then carrying out non-free radical catalytic oxidation, so that nitrite and sulfamethoxazole are synchronously removed within a preset reaction time; in the reaction process, nitrite serves as a removed pollutant to be subjected to oxidation-reduction conversion and also serves as a degradation path regulator to inhibit generation of nitro by-products, a non-free radical oxidation system is constructed through carbonized polydopamine coated cobalt nanoparticles and peroxymonosulfate, a degradation path is regulated and controlled by the nitrite, and the degradation of the nitro by-products is inhibited. Nitrite and sulfamethoxazole in the water body are synchronously removed, and high-toxicity nitro byproducts are inhibited.

This invention relates to the field of graphene materials technology, and discloses a modified graphene material and its preparation method. The preparation method includes: modifying graphene oxide with sodium lignosulfonate through π-π stacking to prepare an aqueous stable dispersion; introducing saponified rosin acid to attach the rosin acid tricyclic hydrophobic framework to the graphene surface; compounding tung oil emulsion, utilizing the α-tung acid conjugated triene double bond to form a film through free radical oxidation polymerization at room temperature (15-35℃), and covalently bonding graphene into the organic film-forming system through phenolic radical coupling; adding zinc borate, where zinc ions catalyze curing and promote the formation of zinc rosin acid, and borate ions form an inorganic borate ester crosslinking network with the hydroxyl groups of sodium lignosulfonate; adjusting the solid content and grinding to obtain the finished product. The conductive ink prepared by this invention self-cures at room temperature, and the cured coating has excellent water resistance and conductivity stability, making it suitable for heat-sensitive flexible substrates.

The application discloses a slow-release biochar-based compound fertilizer and a production process thereof, and belongs to the technical field of biochar-based fertilizers.The compound fertilizer comprises, in terms of weight parts, modified biochar 30-45 parts, inorganic nutrient raw material 50-65 parts, composite cross-linking binder 4-10 parts and chelated trace elements 1-3 parts;the production process comprises, in sequence, biochar micropore cleaning and activation, free radical oxidation modification, surface grafting polymerization, vacuum impregnation loading and cross-linking embedding granulation;the application increases oxygen-containing functional groups on the surface of biochar and constructs hierarchical pore structures through an oxalic acid-assisted catalytic free radical oxidation system and a maleic anhydride-itaconic acid double monomer grafting technology;through modification of biochar and in combination with a vacuum loading process, nutrients are locked inside the hierarchical pores, and then, a moisture-responsive binder coating is supplemented, so that double synergistic slow release of nutrients is realized, the problems of loose nutrient loading, easy loss and short slow-release period of existing carbon-based fertilizers are solved, and the application is especially suitable for saline-alkali soil improvement and dry farming.

According to the wastewater treatment device and method for reducing membrane pollution provided by the invention, through ordered coupling and synergistic effect of iron-carbon micro-electrolysis and ozone oxidation, respective technical advantages are brought into full play, and through catalytic promotion of a micro-electrolysis product on ozonation, stronger free radical oxidation capacity is generated, so that the membrane pollution is reduced. More efficient conversion and removal of pollutants are realized, and a more stable water inlet condition is provided for membrane separation. A built-in intelligent control unit of the device innovatively combines an LSTM prediction model, an NSGA-II multi-objective optimization algorithm and adaptive PID control to form a closed-loop intelligent control system, can adaptively optimize the pretreatment strength and membrane operation parameters according to the dynamic changes of the inlet water quality and the membrane pollution state, changes passive cleaning into active prevention and control, and improves the control efficiency. And on the premise of ensuring the effluent quality, the membrane pollution rate is obviously delayed. Due to the modular membrane component design, the device can quickly adapt to membrane processes with different precisions, and the universality of the technology is enhanced.

The invention discloses a method for removing pollutants in a nanofiltration membrane concentrated solution through cooperation of coagulating sedimentation, Fenton oxidation and electrochemical oxidation, and belongs to the technical field of water pollution control. Aiming at the kitchen waste leachate nanofiltration membrane concentrated solution, the invention discloses a'coagulating sedimentation-Fenton oxidation-electrochemical oxidation 'cooperative treatment method, and provides an optimal parameter combination adapted to the method at the same time, the coagulating sedimentation process under the parameter combination can effectively remove organic matters (COD and TOC), nitrogen and phosphorus nutritive salts (TN and TP) and chromaticity pollutants in the nanofiltration membrane concentrated solution, and the effluent quality of the nanofiltration membrane concentrated solution is improved. The Fenton oxidation process can balance the synergistic effect of free radical oxidation and flocculation, so that efficient degradation of organic matters can be ensured, and stable operation of the system can be maintained; the chemical oxygen demand (COD), the biochemical oxygen demand (BOD5), the total nitrogen (TN), the total phosphorus (TN) and the chromaticity of the water sample treated by the method can meet the emission standards, and an industrial-grade solution for reference is provided for harmlessness of the nanofiltration membrane concentrated solution.

The application discloses a kind of combustion flue gas collaborative purification system and method.System includes combustion equipment ontology, high-temperature reaction section, NO2 adding device, low-temperature oxidation section and pollutant removal device.High-temperature reaction section makes flue gas stay at 850-1100 DEG C for ≥3 seconds, NO2 is fully dissociated to generate free radical, and free radical oxidizes NO, CO, VOCs and part of SO2 in flue gas;Low-temperature oxidation section makes flue gas to 200 DEG C before stay for ≥2 seconds, makes residual NO be converted into NO2 by thermal oxidation to supplement chain cycle, and promotes SO2 to be oxidized into SO3.The application meets the reaction condition of free radical oxidation and thermal oxidation respectively, significantly improves the efficiency of multi-pollutant collaborative purification, and is suitable for coal-fired power plant, gas turbine, coking furnace and other combustion equipment.

The invention relates to the technical field of organic solid waste recycling, in particular to a method for humifying kitchen waste through alkali activation of peroxydisulfate. The method comprises the following steps: firstly, carrying out crushing treatment on pretreated kitchen waste residues to obtain slurry; and sequentially adding an alkaline raw material and peroxydisulfate into the slurry, and carrying out an activation reaction to complete humification of the kitchen waste. According to the method, the synergistic effect of free radical oxidation and alkaline polymerization generated by alkali activation of peroxydisulfate is creatively utilized, efficient humification of the kitchen waste can be achieved within one hour under the conditions of normal temperature and normal pressure, the treatment efficiency is improved by hundreds of times compared with that of traditional biological aerobic fermentation, and the method is suitable for industrial production. And the initial investment cost and the occupied area of facilities are obviously reduced.

The invention provides manganese dioxide nano-enzyme loaded with gold and silver nano-clusters as well as a preparation method and application of the manganese dioxide nano-enzyme, and relates to the technical field of biomedical detection. The manganese dioxide nano-enzyme loaded with the gold and silver nano-clusters has enzyme activity similar to that of peroxidase. The manganese dioxide nano-enzyme loaded with the gold and silver nano-clusters is combined with glucose oxidase to realize high-sensitivity and selective detection on glucose, wherein the detection linear range is 0.025-0.2 mM, and the detection limit is 0.012 mM. The detection method is simple and convenient to operate, does not need a complicated free radical oxidation process, and avoids color development interference and uncertainty caused by free radical reaction in a general method. Meanwhile, the method does not need complex instruments and equipment, the glucose concentration can be preliminarily judged only through naked eyes, the method is suitable for rapid detection and field application, and the detection efficiency and convenience are greatly improved. Compared with a natural enzyme, the nano-enzyme provided by the invention has better stability and durability, and can keep activity in a wider temperature and pH range.

The invention discloses a method for preparing high-activity nickel-iron hydrotalcite by resource utilization of chemical nickel-plating waste liquid, which comprises the following steps: firstly, adjusting the pH value of the chemical nickel-plating waste liquid to an acidic condition, then adding Fe < 2 + > salt and hydrogen peroxide to form a Fenton-like system, destroying an organic complexing structure in the waste liquid through free radical oxidation, releasing complexing-state Ni < 2 + >, and co-depositing the complexing-state Ni < 2 + > and Fe to generate a precursor; and then adjusting the pH value of the system to be alkaline, continuously stirring and aging to form NiFe-LDH solid precipitate, and separating, washing and drying to obtain a NiFe-LDH product. According to the method, the nickel ion recovery rate can exceed 99.99%, the nickel concentration of the supernatant of NiFe-LDH precipitation is lower than 0.5 ppm, and the obtained NiFe-LDH has excellent electrochemical oxygen evolution reaction catalytic performance; the method realizes resource regeneration and high value-added utilization of the heavy metals in the chemical nickel plating waste liquid, and has the advantages of greenness, economy and sustainability.

The application relates to a preparation method and application of a self-microporous non-fluoride ion polymer and an ion exchange membrane, relates to the field of high polymer structure design, and the self-microporous non-fluoride ion polymer is characterized in that the polymer and the membrane have a structure of formula (1): wherein x and y are molar percentages of sulfonated structure units and other functionalized structure units in total units, x=25% to 95%, y=75% to 5%; R is any one or two structures as follows: due to the existence of rigid and twisted monomers in the polymer, and the fact that the polymer main chain does not contain fluorine groups and ether bonds and other sites vulnerable to free radical attack, the self-microporous non-fluoride ion polymer has high ion selectivity, excellent ion transmission capacity and strong anti-free radical oxidation stability, and has wide application prospects in the field of electrochemical energy storage.

The utility model relates to the technical field of underground water treatment, and particularly discloses electro-catalysis type polluted underground water extraction treatment equipment which comprises a mounting platform, a reaction tank is fixedly connected to one side of the top of the mounting platform, and an ion exchange membrane is fixedly connected to the middle of the inner wall of the reaction tank; through the arrangement of the reaction tank, the ion exchange membrane, the anode tube and the cathode tube, when the device is used, the water injection pipe at the top of the reaction tank is connected with the second pump body, polluted underground water is discharged into the reaction tank through the second water pumping pipe, and the tank body is divided into the anode chamber and the cathode chamber by the ion exchange membrane in the middle of the inner wall of the reaction tank; the insulation connecting plate is fixed to the tank top and connected with the anode tube and the cathode tube, the anode tube serves as an anode to generate hydroxyl free radical oxidation pollutants, the cathode tube serves as a cathode to complete a reduction reaction, and the ion exchange membrane ensures selective ion migration of the two chambers and prevents cross interference of products. Therefore, the effects of efficiently degrading pollutants, enhancing the mass transfer efficiency of a reaction system and preventing electrode passivation are achieved.

The application relates to a preparation method and application of a gel-type sodium bisulfite activated potassium permanganate slow-release composite medicament taking silica sol as a carrier, and relates to the technical field of pollution treatment and environmental remediation. In order to solve the problems that the traditional active free radical oxidation treatment mode usually has instantaneous release of oxidants, self-quenching of free radicals, and difficulty in continuously controlling reaction, and that excessively high instantaneous concentration of free radicals leads to excessive oxidation reaction, the slow-release composite medicament dissolves potassium permanganate and sodium bisulfite into silica sol, utilizes the double-layer compression effect induced by electrolytes and the particle aggregation caused by van der Waals force to form a three-dimensional gel network structure, fixes water molecules and the two medicaments in the gel network structure, and due to the osmotic pressure in water, the medicament molecules will gradually dissolve into water, and finally, slow-release control of the medicaments is realized. The application can obtain a preparation method and application of a gel-type sodium bisulfite activated potassium permanganate slow-release composite medicament taking silica sol as a carrier.

The invention provides iron-nitrogen co-doped sludge-based biochar as well as a preparation method and application thereof in pollutant degradation. The material takes municipal sludge as a carbon source, and is directly synthesized through a simple one-step pyrolysis method under the condition of no additional pretreatment, so that the energy consumption and the process complexity are reduced. Compared with a traditional method, by optimizing the proportion of the sludge, the iron source and the nitrogen source (the mass ratio is preferably 40: (1-2): (1-2)) and regulating and controlling the heating rate to 10 DEG C / min, the material has a spherical porous structure and rich iron-nitrogen coordination structures and pyridine nitrogen active sites. In a periodate system, the material shows excellent catalytic activity, and the removal rate of bisphenol A within 30 minutes is as high as 96.1%, which is far superior to that of similar non-doped materials and other iron-based catalysts. In addition, due to the surface adsorption characteristic of the material, BPA molecules are close to an active center, the reaction path is effectively shortened, and the generation of free radical and non-free radical oxidation pathways is synergistically promoted. The material has exclusive degradation adaptability to typical endocrine disruptors, and is suitable for industrial tail water, paper mill wastewater and other difficult-to-treat fields. According to the invention, resource utilization of municipal sludge is realized, and a green, economic, simple and efficient wastewater advanced treatment solution is provided.

The application discloses a kind of water body pollutant degradation methods based on colloidal calcium peroxide, the water body pollutant degradation methods based on colloidal calcium peroxide include the following steps: colloidal calcium peroxide is mixed with the water body to be treated containing pollutant, forms mixed water body, and the pollutant is degraded by reaction.This application utilizes homogeneous nucleation method to prepare colloidal calcium peroxide, then utilizes colloidal calcium peroxide in water body by the active site of surface calcium ion and combines with pollutant, and utilizes direct electron transfer of its surface peroxide group, realizes the efficient oxidative degradation to various refractory pollutants.This application colloidal calcium peroxide degradation pollutant mechanism is mainly dominated by non-radical effect, avoids the problem that traditional free radical oxidation path is easily interfered by water body matrix, can keep efficient degradation performance in wide pH range, has good anti-interference ability.

The invention discloses a slow-release algae-controlling agent suitable for filamentous cyanobacterial bloom and a preparation method and application thereof. The slow-release algae-controlling agent is a coated pellet with potassium persulfate as a core and a Ca ion crosslinking chitosan network as a shell layer. Wherein the particle size of the coated small balls is 1.5 mm to 2.0 mm; and the thickness of the shell layer is 10-30 [mu] m. In the slow-release algae control agent, potassium persulfate serves as an algae inhibition active substance, a Ca ion cross-linked chitosan network shell layer can flocculate filamentous blue-green algae with negative electricity in a targeted mode, and the filamentous blue-green algae is specifically inhibited through a dual synergistic mechanism of potassium persulfate free radical oxidation and shell layer targeted flocculation.

The invention discloses a preparation method for constructing an azabicyclo [3.3. 1] bridge ring structure through manganese-mediated free radical oxidation cyclization. Belongs to the technical field of organic synthesis. According to the preparation method, an indole / pyrrole compound is subjected to a free radical oxidation cyclization reaction under the action of a manganese reagent and an additive to obtain the azabicyclo [3.3. 1] bridged ring structure compound. The method disclosed by the invention is simple, convenient and safe to operate, few in reaction steps, high in reaction efficiency and strong in compatibility of substrate functional groups, has great advantages in structural modification of lead drug molecules, and also provides a new thought and a new method for efficient total synthesis of the substructure natural product.

A catalyst proton membrane coating and a preparation method therefor, a membrane electrode, and a fuel cell. The preparation method comprises: firstly, adding a sodium resin into a water-alcohol dispersion of a Pt / C catalyst, and fully stirring and dispersing same to obtain a catalyst slurry; secondly, coating the catalyst slurry on a PTFE membrane, drying same at normal temperature, then transferring same into an inert atmosphere sintering box, and performing a heat treatment to obtain a catalyst-PTFE coating membrane; thirdly, preparing the catalyst-PTFE coating membrane and a proton exchange membrane into a catalyst proton membrane transfer printing layer by means of hot-press transfer printing; and finally, performing a protonation treatment on the catalyst proton membrane transfer printing layer, so as to obtain a catalyst proton membrane coating. By utilizing the characteristic of good thermal stability of the sodium resin, the crystallization degree of a perfluorosulfonic acid resin in the catalyst proton membrane coating is improved by means of a subsequent heat treatment, thereby effectively improving the resistance to free radical oxidation and corrosion.